The flashcards below were created by user
dbernal
on FreezingBlue Flashcards.
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Calcite
- CaCO3 Trigonal hexagonal 32/m
- Color: colorless or white, also gray, yellow green
- Habit: Crystalline, granular
- Luster: Vitreous to pearly
- Harness: 3
- Uniaxial
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Azurite
Cu 3(CO 3) 2(OH) 2
Monoclinic - Color: dark, royal blue
- Habit: Prismatic, tabular
- Luster: vitreous
- Hardness: 3.5 to 4
- Biaxial (+)
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Magnetite
Fe 3O 4
- Isometric 4/m 3 2/m
- Color: Balck, gray
- Habit: Octahedral, fine granular to massive
- Luster: metallic
- Hardness: 5.5 -6.5
- Streak: black
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Olivine
- (Mg, Fe)2SiO4
- Orthohombic
- Color: yellow to yelllow-green
- Habit: massive to granular
- Luster: vitreous
- Streak: white
- Hardness: 6.5-7
- Biaxial (+)
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Quartz
SiO 2
- Trigonal
- Color: colorless to black
- Habit: drusy, fine-grained to microcrystalline, massive
- Luster: vitreous- wazy to dull when massive
- Streak: white
- Hardness: 7
- Uniaxial (+)
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Orthoclase (k-feldspar)
KAlSi 3O 8
- Monoclinic (2/m)
- Color: Colorless, green/grey, yellow, white pink
- Habit: anhedral or euhedral; tabular
- Luster: Vitreous, pearly on cleavage surfaces
- Streak: white
- Hardness: 6
- Biaxial (-)
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Ulexite
NaCaB 5O 6(OH) 6 5(H 2O)
- Triclinic
- Color: colorless to white
- Habit: acicular to fibrous
- Luster: vitreous, silky or satiny in fibrous aggregates
- Streak: white
- Hardness: 2.5
- Biaxial (+)
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Cinnabar
HgS
- Trigonal
- Color: red, toward brown and lead-gray
- Habit: Rhombohedral to tabular
- Luster: admantine to dull
- Streak: scarlet
- Hardness: 2-2.5
- Uniaxial (+)
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Diopside
MgCaSi 2O 6
- Monoclinic 2/m
- Color: light to dark green
- Habit: short prismatic crystals, may be granular, columnar, massive
- Luster: vitreous to dull
- Streak: white
- Harness: 5.5 -6.5
- Biaxial (+)
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Wollastonite
Ca 2Si 2O 6?
- Triclinic
- Color: white, colorless to grey
- Habit: lamellar, radiating, compacy and fibrous aggregates
- Luster: vitreous or dull to pearly on cleavage surfaces
- Streak: white
- Hardness: 4.5 to 5.0
- Biaxial (-)
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